公开(公告)号：US20230321740A1

公开(公告)日：2023-10-12

申请号：US17733117

申请日：2022-04-29

Applicant: Changsha University of Science and Technology

Inventor： Cong MAO ,  Ziyang CHEN ,  Yinghui REN ,  Wei LI ,  Yuanqiang LUO ,  Gang WU ,  Mingjun ZHANG ,  Kun TANG ,  Yongle HU ,  Feng SHI ,  Weidong TANG ,  Ci SONG

IPC: B23H5/10 ,  B23H5/12 ,  B23H5/06 ,  B24B7/22 ,  B23H9/00 ,  B24B7/24

CPC classification number: B23H5/06 ,  B23H5/10 ,  B23H5/12 ,  B23H9/008 ,  B24B7/228 ,  B24B7/24

Abstract: The invention provides an electrochemical discharge-assisted micro-grinding device for micro-components of brittle and hard materials. The device includes a micro-grinding tool, grinding fluid, a workpiece, an auxiliary electrode, a processing groove, and a pulsed DC power supply; the processing groove is filled with grinding fluid; the micro-grinding tool, the workpiece, and the auxiliary electrode are immersed in the grinding fluid; the micro-grinding tool is composed of a conductive grinding tool base, an electroplating layer, and insulated superabrasives. The micro-grinding tool is connected to the negative electrode of the pulsed DC power supply; the grinding fluid is composed of H2O2, Na2CO3, EDTA-Fe-Na, and deionized water; the workpiece material is brittle and hard; a large number of micro structures need to be produced on the surface of the workpiece.

公开(公告)号：US20200319058A1

公开(公告)日：2020-10-08

申请号：US16904533

申请日：2020-06-17

Applicant: Changsha University of Science and Technology

Inventor： Minhui CHEN ,  Lairong YIN ,  Hongwei HU ,  Tianzan HE ,  Cong MAO ,  Jinhang WANG ,  Dang ZHOU ,  Anwei JIANG

IPC: G01M5/00 ,  B62D33/02 ,  B60P3/00

Abstract: A bridge detecting vehicle with two foldable arms, including: a vehicle body, slewing mechanisms, horizontal and vertical arms and telescopic arms. One end of the two horizontal arms is respectively arranged on the slewing mechanisms, and the other end of the two horizontal arms is respectively connected to the two horizontal arms. A crossed arm is provided between the two horizontal arms. The two vertical arms are respectively connected to the two horizontal arms via ball joints. A detecting device is respectively provided at rear ends of the two telescopic arms.

公开(公告)号：US20200147755A1

公开(公告)日：2020-05-14

申请号：US16740436

申请日：2020-01-11

Applicant: Changsha University of Science and Technology

Inventor： Cong MAO ,  Yongle HU ,  Linfeng XIAO ,  Kun TANG ,  Mingjun ZHANG ,  Zhikang ZHANG ,  Lairong YIN

IPC: B24B53/047 ,  B24B53/095

Abstract: The present application discloses a single-point diamond dresser for a grinding wheel based on acoustic emission online monitoring, which includes a support module, an anti-interference module, a compression cooling module and an acoustic emission online monitoring module. An acoustic emission sensor monitors the dressing state of the grinding wheel online; a damping sheet and a damping interlayer greatly reduce external noise interference; a high pressure coolant causes an upward elastic deformation of an elastic spacer and the damping sheet, enlarging a contact force between the acoustic emission sensor and the core and moreover improving a sensitivity of the acoustic emission sensor; the coolant flows through the coolant passages in the core to cool a dressing area; current limiting passages, pressure relief cavities and perforated pressure-relief plates limit flow and reduce a pressure of the coolant, reducing the interference of the coolant on the grinding wheel dressing.

公开(公告)号：US20200070313A1

公开(公告)日：2020-03-05

申请号：US16677635

申请日：2019-11-07

Applicant: Changsha University of Science and Technology

Inventor： Cong MAO ,  Lairong YIN ,  Yujie ZHONG ,  Yongle HU ,  Peihao CAI ,  Mingjun ZHANG ,  Yifeng JIANG

IPC: B24D5/02 ,  B24D18/00

Abstract: Disclosed are an orderly-micro-grooved PCD grinding wheel for positive rake angle processing and a preparation method thereof. A PCD film is deposited on the outer circumferential surface of a wheel hub, and a plurality of microgrooves with high depth-width ratio and micro-grinding units with positive rake angles are orderly provided on the outer circumferential surface of the entire PCD film. The method includes: depositing the PCD film on the outer circumferential surface of the wheel hub by a HFCVD technique; and manufacturing a plurality of microgrooves with a high depth-width ratio (circumferential width: dozens of micrometers; depth: hundreds of micrometers) and an axial length that is equal to the thickness of the grinding wheel and a plurality of micro-grinding units with positive rake angles on the outer circumferential surface of the entire PCD film by water-jet guided laser technique, where the micro-grinding units and the microgrooves are orderly arranged.

公开(公告)号：US20230294189A1

公开(公告)日：2023-09-21

申请号：US17733109

申请日：2022-04-29

Applicant: Changsha University of Science and Technology

Inventor： Cong MAO ,  Weidong TANG ,  Yuanqiang LUO ,  Yinghui REN ,  Wei LI ,  Mingjun ZHANG ,  Kun TANG ,  Gang WU ,  Yongle HU ,  Feng SHI ,  Ziyang CHEN ,  Zhuo WEN

IPC: B23H9/02 ,  B23H3/02 ,  B23H3/08

CPC classification number: B23H9/02 ,  B23H3/02 ,  B23H3/08 ,  B23H2300/10

Abstract: This paper describes an invention involving an electrochemical discharge-enabled micro-grinding process for micro-components of silicon-based materials. The specific machining method is described below. A micro-grinding tool and an auxiliary electrode are respectively connected to the negative and positive electrodes of a pulsed DC power supply. When the current flows through the loop, an electrochemical hydrogen evolution reaction (HER) occurs at the micro-grinding tool in the grinding fluid, which generate multiple hydrogen bubbles. The bubbles coalesce into an insulating gas film and separate the micro-grinding tool from the grinding fluid; when the critical voltage is reached, the gas film is broken down and an electrochemical discharge occurs accompanied by discharge spark; under the action of the discharge spark, the surface material of the workpiece in the discharge-affected region is directly ablated to generate a heat-affected layer (HAL), namely, physical modification.

公开(公告)号：US20210268626A1

公开(公告)日：2021-09-02

申请号：US17321394

申请日：2021-05-14

Applicant: Changsha University of Science and Technology

Inventor： Cong MAO ,  Lairong YIN ,  Yujie ZHONG ,  Yongle HU ,  Yuanqiang LUO ,  Weidong TANG ,  Peihao CAI ,  Mingjun ZHANG ,  Yifeng JIANG ,  Aiming TANG

IPC: B24D5/02

Abstract: An orderly-micro-grooved PCD grinding wheel includes a wheel hub, a polycrystalline diamond (PCD) film, a number of micro-grinding units and a number of microgrooves. The PCD film is deposited on an outer circumferential surface of the wheel hub. The PCD film is processed by a water-jet guided laser device to form the microgrooves with high depth-width ratio and micro-grinding units with positive rake angles on the entire outer circumferential surface of the PCD film. An axial length of each micro-grinding unit and an axial length of each microgroove are equal to a thickness of the grinding wheel, respectively. The microgrooves are spaced apart by the micro-grinding units.